Despite their promise as a scalable intervention modality for binge eating and related problems, reviews show that engagement of app-based interventions is variable. Issues with usability may account for this. App developers should undertake usability testing so that any problems can be identified and fixed prior to dissemination. We conducted a qualitative usability evaluation of a newly-developed app for binge eating in 14 individuals with a diagnostic- or subthreshold-level binge eating symptoms. Participants completed a semi-structured interview and self-report measures. Qualitative data were organized into six themes: usability, visual design, user engagement, content, therapeutic persuasiveness, and therapeutic alliance. Qualitative and quantitative results indicated that the app demonstrated good usability. Key advantages reported were its flexible content-delivery formats, level of interactivity, easy-to-understand information, and ability to track progress. Concerns with visual aesthetics and lack of professional feedback were raised. Findings will inform the optimal design of app-based interventions for eating disorder symptoms.

尽管它们有望成为暴食和相关问题的可扩展干预方式，但评论表明，基于应用程序的干预措施的参与是可变的。可用性问题可能是造成这种情况的原因。应用程序开发人员应进行可用性测试，以便在传播之前识别和修复任何问题。我们对新开发的暴食应用程序进行了定性可用性评估，该应用程序对 14 名具有诊断或亚阈值暴食症状的个体进行了暴饮暴食。参与者完成了半结构化访谈和自我报告措施。定性数据分为六个主题：可用性、视觉设计、用户参与度、内容、治疗说服力和治疗联盟。定性和定量结果表明该应用程序表现出良好的可用性。报告的主要优势是其灵活的内容交付格式、交互性水平、易于理解的信息以及跟踪进度的能力。提出了对视觉美学和缺乏专业反馈的担忧。研究结果将为基于应用程序的饮食失调症状干预措施的最佳设计提供信息。